Last update
5/27/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Good
Based on 16 Reviews
8.3
Supplement Facts
Serving Size: 2 Tablets
Amount Per Serving
%DV
Vitamin D3 (as Cholecalciferol)
13 mcg (500 IU)
63%
Calcium (as Calcium Citrate)
630 mg
48%
Top Medical Research Studies
7
We explored the effects of oral calcium and vitamin D on patients suffering from dengue fever. In our study involving five cases, we observed significant improvement in the overall clinical condition of the patients. Additionally, there was a noticeable reduction in the duration of symptoms, including nausea. Despite these improvements, it is vital to note that the study's small size limits the generalizability of these findings. More extensive research is necessary to confirm these effects.
Read More
Most Useful Reviews
9
Best for nausea
100 people found this helpful
I wish I had discovered this vitamin sooner, having tried numerous others without success. This one is by far the most effective for arthritis and is gentle on the stomach. If you're seeking something to combat nausea, I highly recommend giving this a try.
Read More
9
No nausea reported
Taking about 3-4 pills daily is effective. It's best taken two hours after a meal and can be consumed on an empty stomach without interfering with calcium absorption. This supplement is very much recommended for those with thin bones or fragile teeth due to age or nutrient deficiencies. It's crucial to combine it with exercise and sunlight for a healthy lifestyle.
Read More
9
Nausea not induced
I find this calcium citrate and vitamin D3 excellent. Calcium citrate, a chelated form that the body easily absorbs, does not cause nausea, stomach pain, or diarrhoea. It's beneficial for certain types of urolithiasis, as it can alkalise stones and help dissolve them. Vitamin D is essential for the cardiovascular, endocrine, hormonal, and nervous systems, and aids in maintaining calcium and phosphorus levels for strong bones, joints, and teeth. I recommend this supplement.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
- All Researches
7
We explored the effects of oral calcium and vitamin D on patients suffering from dengue fever. In our study involving five cases, we observed significant improvement in the overall clinical condition of the patients. Additionally, there was a noticeable reduction in the duration of symptoms, including nausea. Despite these improvements, it is vital to note that the study's small size limits the generalizability of these findings. More extensive research is necessary to confirm these effects.
Read More
User Reviews
USERS' SCORE
Good
Based on 16 Reviews
8.3
- All Reviews
- Positive Reviews
- Negative Reviews
9
Best for nausea
100 people found this helpful
I wish I had discovered this vitamin sooner, having tried numerous others without success. This one is by far the most effective for arthritis and is gentle on the stomach. If you're seeking something to combat nausea, I highly recommend giving this a try.
Read More
9
No nausea reported
Taking about 3-4 pills daily is effective. It's best taken two hours after a meal and can be consumed on an empty stomach without interfering with calcium absorption. This supplement is very much recommended for those with thin bones or fragile teeth due to age or nutrient deficiencies. It's crucial to combine it with exercise and sunlight for a healthy lifestyle.
Read More
9
Nausea not induced
I find this calcium citrate and vitamin D3 excellent. Calcium citrate, a chelated form that the body easily absorbs, does not cause nausea, stomach pain, or diarrhoea. It's beneficial for certain types of urolithiasis, as it can alkalise stones and help dissolve them. Vitamin D is essential for the cardiovascular, endocrine, hormonal, and nervous systems, and aids in maintaining calcium and phosphorus levels for strong bones, joints, and teeth. I recommend this supplement.
Read More
9
Highly absorbable calcium
Excellent supplement containing Calcium Citrate and Vitamin D3 from 21st Century. This product is highly absorbable and supports bone health without causing nausea, stomach pain, or diarrhoea. It's recommended for various conditions and combining calcium with magnesium is ideal for athletes and those under stress. Vitamin D aids calcium's entry into bones, encouraging strength. I wholeheartedly endorse this supplement.
Read More
9
No side effects
Chelated form with 90-95% absorption that is independent of any additional factors. Its benefits include the absence of side effects, good tolerance among children and adults. Unlike calcium carbonate and gluconate, which may cause negative effects such as nausea, stomach pain, and diarrhoea, citrate does not provoke such issues, as it is a form naturally present in the body. Calcium citrate is also recommended for certain types of kidney stones as it can alkalise and help break down the stones.
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Frequently Asked Questions
7.5
Nausea relief observed
118 people found this helpful
Good supplement purchased for my mother. She liked it. She mentioned that she felt a bit nauseous initially, but after a week of regular usage, the nausea had disappeared, though it may have been merely coincidental. Overall, it is quite an effective supplement, but the dosage is rather small; my mother takes it alongside a complex of other vitamins.
9
No side effects noted
This calcium citrate is commendable as it does not induce any side effects—neither nausea nor weakness, which I experienced with products from other companies. I highly recommend it!
9
Nausea not induced
I find this calcium citrate and vitamin D3 excellent. Calcium citrate, a chelated form that the body easily absorbs, does not cause nausea, stomach pain, or diarrhoea. It's beneficial for certain types of urolithiasis, as it can alkalise stones and help dissolve them. Vitamin D is essential for the cardiovascular, endocrine, hormonal, and nervous systems, and aids in maintaining calcium and phosphorus levels for strong bones, joints, and teeth. I recommend this supplement.
9
Highly absorbable calcium
Excellent supplement containing Calcium Citrate and Vitamin D3 from 21st Century. This product is highly absorbable and supports bone health without causing nausea, stomach pain, or diarrhoea. It's recommended for various conditions and combining calcium with magnesium is ideal for athletes and those under stress. Vitamin D aids calcium's entry into bones, encouraging strength. I wholeheartedly endorse this supplement.
7.5
Nausea diminished
2 people found this helpful
Good additive bought for my mother. She liked it. She reported feeling a little nauseous initially, but after a week of regular use, the nausea subsided, possibly just a coincidence. In general, it is quite an effective additive, although the dosage is somewhat small; my mother takes it in conjunction with other vitamins.
7
We explored the effects of oral calcium and vitamin D on patients suffering from dengue fever. In our study involving five cases, we observed significant improvement in the overall clinical condition of the patients. Additionally, there was a noticeable reduction in the duration of symptoms, including nausea. Despite these improvements, it is vital to note that the study's small size limits the generalizability of these findings. More extensive research is necessary to confirm these effects.
References
- Sánchez-Valdéz E, Delgado-Aradillas M, Torres-Martínez JA, Torres-Benítez JM. Clinical response in patients with dengue fever to oral calcium plus vitamin D administration: study of 5 cases. Proc West Pharmacol Soc. 2009;52:14. PubMed
